vtkHyperOctree->DeepCopy() provides shallow copy.

This issue was created automatically from an original Mantis Issue. Further discussion may take place here.

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As reported on vtkUsers mailing list: http://www.vtk.org/pipermail/vtkusers/2013-January/127166.html

The DeepCopy() method of vtkHyperOctree actually provides a shallow copy.